gripe at

gripe at (someone)

To complain, often continually and in an irritating manner, to someone. I turned the thermostat up, so you all can stop griping at me about how cold it is in here, thanks. Michael, as long as you have long hair, Grandma is going to gripe at you—you better get used to it.
See also: gripe
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

gripe at someone

to complain to someone. Stop griping at me! There is no need to gripe at your little brother.
See also: gripe
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in classic literature ?
The mean and low, yet strangely man-like expression of his wilted countenance; the prying and crafty glance, that showed him ready to gripe at every miserable advantage; his enormous tail (too enormous to be decently concealed under his gabardine), and the deviltry of nature which it betokened,--take this monkey just as he was, in short, and you could desire no better image of the Mammon of copper coin, symbolizing the grossest form of the love of money.
He said: "If they want to have a gripe then wait till the end of the season and then they can have a gripe at me - if we don't achieve what we hope to that is.